Create Padre::Wx::DockedPanel

Description

Currently all the tabs displayed in the bottom pane and side pane (Output, Syntax Check, Error List, Subs), have their own code to handle the inserting and deletion of the tab, the management of the relevant menu entries, etc. Create a generic Padre::Wx::DockedPanel? that provides all the common functionality and have at least the Error List use that. This will also make life easier for newcomers who want to add some new pane but without wasting time to figure out all the related Padre internals.